Translation of "Grimaced" in Japanese

The students grimaced at the teacher.

学生たちは先生にしかめつらをして見せた。

He grimaced as if memories of his bitter past were crashing like waves inside his head.

辛い過去の記憶が波のように彼の頭の中に打ち寄せているのか、彼は渋面をつくった。